Means for making nipples.



J. A. DOWD.

MEANS FOR MAKING NIPPLES.

APPLICATION FILED JAN-25. 19x5.

omvEys 6 llVl/EIVTOR John J1 flowd 4 SHEETS-SHEET l- BY J Patented Nov. 16, 1915.

WITNESSES: M ew/p.

COLUMBIA PLANOORAPH c0.,wAsmNGTON. D. c.

J. A. DOWD.

MEANS FOR MAKING NIPPLES.

APP LICATlON FILED JAN-25. 1915.

1 1 60, 1 50. Patented N 0v. 16-, 1915.

4 SHEETSSHEET 2.

Mf v Q Joknlifiow Z.

COLUMBIA PLANOORAPH co.,WAsmNuToN. D.,:..;

J. A. DOWD.

MEANS FOR MAKING NIPPLES.

APPLICATlON FILED JAN-25. 1915.

Patented Nov. 16, 1915.

4 SHEETSSHEET 3- WITNESSES .l. A. DOWD.

MEANS FOR MAKING NIPPLES.

APPLICATION FILED IAN-25. 1915.

l 1 60, 1 50. Patented Nov. 16, 1915.

4 SHEETS-SHEET 4.

JOHN A. DOWD, or FALL RIVER, MASSACHUSETTS.

MEANS FOR MAKING NIPPLES.

Specification of Letters Patent.

Patented Nov. is, 1915.

Application filed January 25, 1915. Serial No. 4,232.

To all whom it may concern:

Be it known that 1 JOHN A. Down, residing at Fall River, in the county of Bristol'and State of Massachusetts, have invented a new and Improved Means for Making Nipples, of which thev following is a specification.

My invention relates to the manufacture of nipples and it primarily has for its object to provide an improved method for producing tapered nipples from a blank pipe or stock member and by which the operation of initially threading the pipe or stock, forming the initially threaded stock into tapered sections, chamfering the Said stock as each tapered section is formed and severing a completed tapered threaded Section or nipple port-ion from the stock is effected as a succeeding section is being completed into the nipple form and the stock is being chamfered at the point of least diameter between completed tapered or nipple formed sections.

Another object of my invention is to provide an improved means adapted for pro- 7 ducing tapered nipples rapidly and continuously from a blank pipe; in which is included a pilot cutting die, threading dies adapted for cutting the initially threaded pipe or stock member into tapered nipple-like sections,'a chamfering tool and a cutting off tool, so arranged and cooperatively combined, whereby the operation of initially threading the pipe or stock, forming the threaded portion into tapered nipple-like sections, cutting a chamfer between a pair of Such sections and Separating the outermost one of the nipple-like threaded sections from the pipe or stock is efi'ectedfautomatically, in progressivesteps, as the nipple forming or shaping means is in continuous motion in the longitudinal direction of the pipe or stock member.

My invention also has for its purpose to provide a machine for making nipples from a blank pipe or stock member in which is ineluded'an improved arrangementof roller cutting dies that provide fora positive and accurate cutting of the tapered nipple sections, combined with an improved arrangement of chamfering and cutting off tools and means that automatically hold the taper screw cutting device's to the stock, and

simultaneously move the said cutting devices outwardly and inwardly, relatively to the stock engaged thereby as the cutting tools are brought in position to cut a chamfer between a pair of nipple shaped sections of the pipe or stock and as the cutting tool is moved to and from its nipple section severing positions.

With other objects in view that will hereinafter appear, my invention comprehends the improved method and the means for making tapered nipples fully set out in the following description, specifically pointed out in the appended claims and illustrated in the accompanying drawings :-in which:

Figure'l is a Side elevation of my nipple making machine. Fig. 2 is a top plan view thereof. Fig. 3 is a side elevation of so much of the complete machine necessary to illustrate my improved means for forming the-nipples. Fig.4 is a top plan view thereof. Fig. 5 is an end elevation of the same, the bed of the machine being shown in cross section. 6 is a front'elevation of the mechanism for cutting the taper thread in the pipe Stock. of the parts shown in Fig. 6. Fig. 8 is a top plan view thereof. Figs. 9 and 10 are vertical sections of the said mechanism taken on the lines 9-9 and 101O of Fig. 6. Fig. '11 illustrates in side view and in face view the chamfering tool. Fig. 12 illustrates inside elevation and in front elevation the severing or cutting off tool. Fig. 13 is'a diagram that illustrates the applica tion of the roller cutting dies, the chamfering and the severing tools to the threaded spindle. Fig. 14 is a detail view that illus-- trates the cams 20 and 27 and the adjacent parts actuated thereby.

Describing first the general method by which I produce tapered nipples rapidly and continuously from a blank pipe or stock, it should be stated the said stock member is fastened to a chuck and is held from endwise movement during the operation of making the tapered nipples, which in accordance with my method are produced asfollows: The pipe is first threaded uniformly by a suitable pilot thread cutting tool, and after thus threaded, it is formed into successive sections of tapered portions by suitable threading devices. After being formed into two or more of the said tapered portions, that portion of the pipe of smallest Fig. 7 is an'end elevationdiameter (between a pair of tapered sections) is further reduced, by means of a chamfering tool, after which the said reduced or chamfered portion is cut through by a suitable cutting tool thussevering the complete tapered nipple from the stock.

For mechanically producing the tapered nipples in the manner before generally outlined, I employ the means fully described in the accompanying drawings in which A designates the framing of a lathe or pipe machine of the usual construction, and 1 denotes a shaft which is as long as the bed of the said machine and is grooved its entire length, (see 1). The shaft 1 is geared to the spindle of the lathe or pipe machine, and it passes through bearings 33 between which is held a gear 2 loosely mounted on the shaft 1, and is keyed thereto to be turned therebyas the said shaft 1 is revolved. 1

My improved means for making the nipples in the manner above outlined, embodies principally, a carriage on which the pilot thread cutting dies, the taper screw cutting elements, the chamfering and the cutting off 7 tool devices are supported and the said carriageis mounted for being moved in the longitudinal direction of the pipe or stock member the full length thereof, or in other words, the threading, tapering chamfering and cutting off devices are caused to be moved along the pipe or stock member as the initially threaded end is shaped into the nipple sections and the said sections are severed therefrom.

' 4 designates a feed screw that is geared to the head end of the machine, (see Fig. 1) and the said screw 4 is engaged by a nut 5 that is bolted to the side of the carriage B. Nut-5 is of the split pattern commonly used in lathes, with lever 50 to open and close the same, the nut being closed when it is desired to feed the carriage ahead and opened to disengage the said screw to permit the carriage to be pulled back.

6 designates the standard threading or pilot die. which is of the conventional type and can be opened when it is desired to remove the pipe or stock member 41. 5

At a suitable distance behind the die 6 are mounted the taper screw cutting devices, which are in the nature of roller dies 7-7, arranged in oppositely disposed sets, and as best shown in Figs. 6, 7 and 8, by reference to which it will'be seen the said rollers are tapered and mounted to open and close against theinitially threaded pipe section to form the tapered rmembers wm, as diagrammatically illustrated by Fig. 13 of the drawings.

Between the head or hearing blocks for the rollers 7 are mounted stout coil springs 8-, for opening the said roller dies and forcmg their bearing blocks against the cam portions 9-9, one of which is fixedly connected to a shaft 10 and the other to a shaft 11 and the said shafts are journaled transversely of the pipe .or stock member 41 in the housing 90.

12- -13 designate crank levers fixedly .connected to their respective shafts 10 and 11 and 14 is a connecting rod that pivotally joins with the said levers 12 and 13, as is best shown in Figs. 8 and 7, which also show the shaft 11 provided with a crank 15 havin a slotwa 15 for ad'ustabl T receivare supported the chamfering and cutting off tools, presently again'referred to, and the said frame is loosely mounted on the shaft which is journaled in bracket arms 19 on the carriage and which is located in ,front of and in the plane of the shaft 1,

The frame 16 is held to swing freely up or down, and also for freely sliding back and forth on the said shaft'19 and itis normally,

so held, by a .coil spring 21, mounted upon the shaft '19, that a heel portion 16 thereof engages a'cam 20 on a cross shaft 33, "as clearly shown in Figs. 3 and 4.

22 designates a lever connected by a pivot pin 24, with a post 23, and the said lever, which is held to swing vertically, has its front end guided in a slotted post 25, that prevents the lever 22 moving sidewise.

Lever 22 carries an adjustable screw bearing 26, arranged to engage a cam 27 on the shaft 33, such connection being provided so that when the cam 27 is revolved the lever is forced gradually downward until it comes to the stepped or shouldered part 27 on the cam, when the said lever 22 is permitted to rise again. I

A connecting rod 28 provided with a filler block or shoe that fits in its forked end 28*, is connected with the lever 22 and the said rod 28 is freely slidable on thelever 22, the shoe or filler piece 29 touching the underside of the lever '22, and is held to its proper position'by a pin d0.

The upper end of the rod 20 is pivotally suspended from a forked extension 16 that projects from a vertical member 16 of the frame 16 to which the rod 28 is connected by a pin 31, (see Fig. 5), said connection causing the yoke frame 16 to swing up and down with the said rod 28, a spring 32 secured to a fixed part of the carriage and engaging dies 7 to move them to and from the thread-- the shaft 33 that carries the cams 2027 and it meshes with a worm on a shaft 36 suitably mounted on the carriage frame and which carries a gear 37 that meshes with and is driven from the gear 2 on the main shaft 1.

38 is an eccentric keyed onthe other or outer end of the shaft 33, and the said eccentric is connected to the crank 15 that actuates the taper screw roller dies 7-7 by the hooked connecting strap 39, so that when the eccentric revolves it moves the crank 15 forward and back and thereby imparts the required up and down motion to the roller ed pipe or stock member 11, and to permit of disconnecting the eccentric rod or link- 39 from the crank 15, the latter is provided with'a loose bearing 40, which provides for unhooking the member 39 from the crank 15 and allows the operator to move the crank by hand toward the head of the machine in order to release the pipe from the rolls when desired. 7

By reason of the peculiar constructionand novel arrangement of the parts described, a simple, compact and efficient means for reducing a pipe section to nipple members is provided, in which the operation of cutting the pilot or initial thread in the said stock pipe, shaping up the threaded end of the said pipe into tapered nipple members, reducing the thickness of the pipe at points between each pair of nipple sections to the minimum, and the cutting of the nipple formed pipe at such reduced points to sever the completed nipple members from the stock, is quickly and accurately accomplished, since, in the practical operation of my nipple forming means, when the chuck revolves, the shaft 1 and the feed screw 4 is revolved, by their respective gearings the carriage begins to advance along the pipe 1-1, the latter passing through the cutting dies 6 which produce a straight running thread in the said pipe 41.

As the carriage advances along the pipe 41, the threaded end of the said pipe passes between the'taper thread forming rollers or dies 7 which, by reason of the movement imparted thereto by the crank 15 operated by the eccentric 38 on the shaft 32, rolls the nipples into the desired shape.

The chamfering tool (see Fig. 10) is ar ranged to engage the tapered pipe at a point between a pair of taoered portions and the cutting off tool is set to engage the chamfered neck between the tapered sections, it being understood that the several operative parts of my machine are so timed for action that the operation of cutting the initial or pilot thread in the pipe, forming the threaded pipe into tapered nipple sections, reducing the diameter of the pipe between each-pair of tapered sections and cutting off the outermost completednipple section, is effected simultaneously, and continuously maintained along the full length of the pipe or stock member to be reduced to nipples;

It should be stated that the'cam 20, as it revolves, moves the frame 16, that carries the chamfering and cutting off tools, back at the same rate of speed that the carriage is advancing, compressing the spring 21, and by reason thereof holds the chamfer tool and the cutting off tool at the same point on the nipple, as the cam 27 in revolving is pulling the frame 16 down to effect the chamfering' and separating operation.

WVhen the cam 27 is revolved until the step or shoulder 27 passes the screw 26, a flat spring 32 immediately lifts the arm 16, and as soon as the said frame 16 lifts, the step or shoulder 2O on the cam 20 passes the bear ing on the frame 16, and the spring 21 pushes the frame 16 again forward, it being understood that the screw26 is so adjusted that the cutting off tool will be above the highest point of the nipple, so that it will not touch the thread when the said frame 16 moves forwardly.

The operation of threading, tapering, chamfering and separating is entirely automatic. In operation, oil or cutting compound is continuously supplied to the dif ferent tools when the machine is in action.

' What I claim is:

1. In a nipple making machine, the combination with the work holder having provision for holding a pipe and the tool carriage, primary thread cutting members on said tool carriage, taper thread rolling members on said tool carriage adapted for opera tion on the primarily threaded part of the pipe, a chamfering tool on the tool carriage adapted to out a chamber in the pipe at intervals, and a severing tool on the carriage for severing the finished nipples from the stock, and means for imparting relative mo tion between the tool carriage and the work holder.

2. In a. nipple making machine, the combination with the rotatable pipe holder of a traveling carriage, and means for effecting the travel of such carriage, means on said carriage for first cutting a pilot thread on the pipe, other means for subsequently forming a taper thread on the pipe to form the nipple sections and mechanism for severing the nipple sections as they are formed.

3. In a nipple making machine, the combination with the rotatable pipe holder; of a traveling carriage, and means for effecting the travel of such carriage, means on said carriage for first cutting a pilot thread on the pipe, other means for subsequently forming a taper thread on the pipe to form the nipple sections, mechanism for severing the nipple sections as they are formed, said severing mechanism comprising a primary chamfering tool and a cutting oii' tool.

4. In a nipple making machine, the combination with the rotatable pipe holder; of a traveling carriage, means for effecting the travel of said carriage in the longitudinal direction of the pipe, means on said carriage for first cutting a pilot thread on the pipe, other means on the carriage for subsequently forming a taper thread to form the nipple sections, mechanism on the carriage for severing the nipple sections as they are formed, and means for arresting the traveling movement of said severing mechanism during the severing act.

In a nipple making machine, the combination with the rotatable pipe holder, of a traveling carriage, means for eflecting the travel of said carriage in the longitudinal direction of the pipe, means on said carriage for first cutting a pilot thread on the pipe, other means on the carriage for subsequently forming a taper thread to form the nipple sections, mechanism on the carriage for severing the nipple sections as they are formed, means for arresting the traveling movement of said severing mechanism during the severing act, said severing mechanism comprising a primary chamfering tool and a cutting off tool and means for feeding the tools against the work.

6. In a nipple making machine, the combination with the rotatable pipe holder; of a traveling carriage, means for effecting the travel of said carriage in the longitudinal direction of the pipe, means on said carriage for first cutting a pilot thread on the pipe,

other means on the carriage for subsequently v forming a thread to form the nipple sections, mechanism. on the carriage for severing the nipple sections as they are formed, means for arresting the traveling movement of said severing mechanism during the severing act, said severing mechanism comprising a primary chamfering tool and a cutting off tool. and means for feeding said tools to and from the work.

7 In a nipple making machine, the com:

bination with the rotatable pipe holder; of

a traveling carriage, means for effecting the travel of said carriage 1n the longitudinal direction of the pipe, means on said carriage for first cutting a pilot thread on the pipe,

position with relation to the carriage after the cutting act has been completed.

8. In a nipple making machine, the combination with the rotatable pipe holder of a traveling carriage, means for effecting the travel of said carriage in the longitudinal direction of the pipe, means on said carriage for first cutting a pilot thread on the pipe, other means on the carriage for subsequently forming a taper thread to form the nipple sections, mechanism on the carriage for severing the nipple sections as they are formed, means for arresting the traveling movement of said severing mechanism during the severing act, saidsevering mecha said carriage for first cutting a pilot thread on the pipe, other means for subsequently forming a taper thread on the pipe to form the nipple sections, mechanism for severing the nipple sections as they are formed, said other means comprising a pair of sets of opposing taper thread cutting rollers, and means operatively connected with a driven shaft of the machine for moving the sets of cutting rollers to and from each other while engaging the rotatable pipe.

10. In a nipple making machine; the combination with a driven shaft and a rota table pipe holder; of a traveling carriage, means for effecting the travel of said carriage, means on the said carriage for first cutting a pilot thread on the pipe, other means on the carriage for subsequently forming a taper thread on the pipe to form a nipple, mechanism for severing the nipple sections as they are formed, said severing mechanism comprising a primary chamfering tool and a cutting off tool, said cutting 0E tool being set to engage the threaded pipe in advance of its being engaged by the chamtering tool, and means operatively connected with the driven shaft for effecting the movement of the said chamfering and cutting oii' tools to and from the work as the taper thread tool is operated to form a taper threaded section. 1

11. In a nipple making machine; a rota table pipe holder, a driven shaft, a carriage, means for feeding the carriage along the rotatable pipe, other means on the carriage for first cutting a pilot thread on the pipe, oppositely disposed taper thread forming rollers, means for moving the rollers to and from each other to effect the taper thread forming, and mechanism for severing the nipple sections as they are formed, the said forming rollers, the moving means therefor and the severing mechanism being cooperatively connected with the driven shaft.

12. In a nipple making machine, a rotatable pipe holder, in combination With a traveling carriage, and means for effecting a travel of said carriage; means on the said carriage for first cutting a pilot thread on the pipe, other means for subsequently forming a taper thread on the pipe to form the nipple sections, mechanism for severing the nipple sections, as they are formed, the said mechanism comprising a chamfering tool and a cutting off tool, the chamfering tool being located in advance of the cutting off tool and the latter set nearer the center of the nipple than the chamfering tool, and means for moving the said tools back along the nipple formed end of the pipe at the same speed that the carriage is advancing.

13. In a nipple making machine; the combination with a revolving pipe holder and a driven shaft; of a traveling carriage, and means for effecting the travel of the carriage, means on the carriage for first cutting a pilot thread on the pipe, other means for subsequently forming a taper thread on the pipe to form the nipple sections, mechanism for separating the nipples, means operable from the driven shaft for moving the severing mechanism down against the Work, other means for lifting the severing mechanism from the work after the nipples are cut olf, means operated from the driven shaft for moving the severing mechanism back along the pipe as the carriage moves forwardly and other means for returning the severing mechanism to the initial position after its severing operation is completed.

14. In a nipple making machine; the combination with a revolving pipe holder and a driven shaft; of a traveling carriage, and means for effecting the travel of the carriage, means on the carriage for first cutting a pilot thread on the pipe, other means for subsequently forming a taper thread on the pipe to form the nipple sections, mechanism for separating the nipples, means operable from the driven shaft for moving the severing mechanism down against the work, other means for lifting the severing mechanism from the work after the nipples are cut off, means operated from the driven shaft for moving the severing mechanism back along the pipe as the carriage moves forwardly and other means for returning the severing mechanism to the initial position after its severing operation is completed, the said last named means including a coil spring that is actuated under tension as the severing mechanism is being moved back along the threaded pipe to the nipple severing position.

15. In a machine of the class described,

means for rotating a pipe While maintaining it against longitudinal movement, a carriage, means for continuously moving said carriage forwardly in the longitudinal direction of the pipe, means on said carriage for first cutting a pilot thread and subsequently forming a tapering nipple forming thread on the pipe, severing elements on the carriage to travel therewith, and means for holding said severing elements stationary with respect to' the pipe during the severing act.

16. In a machine of the class described, means for rotating a pipe while maintaining it against longitudinal movement, a carriage, means for continuously moving said carriage forwardly in the longitudinal direction of the pipe, means on said carriage for first cutting a pilot thread and subsequently forming a tapering nipple forming thread on the pipe, severing elements on the carriage to travel therewith, means for holding said severing elements stationary with respect to the pipe during the severing act, and means operative upon completion of the severing act for advancing the severing mechanism' along the carriage to a position ready to effect the next cut.

17. In a machine of the class described, means for rotating a pipe while maintaining it against longitudinal movement, acar riage, means for continuously moving said carriage forwardly in the longitudinal direction of the pipe, means on said carriage for first cutting a pilot thread and subsequently forming a tapering nipple forming thread on the pipe, severing elements on the carriage to travel therewith, means for holding said severing elements stationary with respect to the pipe during the severing act, said severing mechanism including severing elements carried by the carriage, a relatively stationarily located driven shaft, and a connection movable with the carriage between the driven shaft and' the severing mechanism for operating the severing elements.

18. In a machine of the class described,

means for rotating a pipe while maintaining it against longitudinal movement, a carriage, means for continuously moving said carriage forwardly in the longitudinal direction of the pipe, means on said carriage for first cuttinga pilot thread and subsequently forming a tapering nipple forming thread on the pipe, severing elements on the carriage to travel therewith, means for holding said severing elements stationary with respect to the pipe during the severing act, means operative upon completion of the severing act for advancing the severing mechanism along the carriage to a position ready to effect the next out, said severing mechanism including severing elements carried by the carriage, a relatively stationarily located driven shaft, and a connection movable with the carriage between the driven shaft and the severing mechanism for operating the severing elements.

[9. In a nipple making machine; a rotatable pipe holder; a driven shaft, a carriage, means for continuously feeding the carriage along the rotatable pipe, other means on the carriage for first cutting a pilot thread on the pipe, taper thread cutting rollers mounted on the carriage that engage the pilot threads of the pipe and shape the pipe into nipple sections, mechanism mounted on the carriage for severing the nippleformed sections from the pipe, the several thread cutting and forming means and the severing means being operatively connected with the driven shaft, and further means actuated from the driven shaft for holding the severing mechanism from traveling forwardly with the carriage.

20. In a nipple making machine; a rotatable pipe holder, a driven shaft, a carriage, means for continuously feeding the carriage along the rotatable pipe, other means on the carriage for first forming a pilot thread on the pipe, taper thread cutting rollers mounted on the carriage that engage the pilot threads of the pipe and shape the pipe into nipple sections, mechanism mounted on the carriage for severing the nipple formed sections from the pipe, the several thread cutting and forming means and the severing means being operatively connected with the driven shaft, further means actuated from the driven shaft for holding the severing mechanism from traveling forwardly, with the carriage, the said last named means including a yoke frame that supports the severing devices slidably mounted on the carriage to move in the longitudinaldirection of the rotatable pipe, a cam device that engages the yoke frame for sliding the frame backward on the carriage as the carriage moves forwardly, and a spring device for returning the said frame to the normal posi- GOpies of this patent may be obtained for tion after the severing operation is completed.

21. In a nipple making machine; the combination With a rotatable pipe holder and a driven shaft, ,of a traveling carriage and a means for effecting the travel of the car riage in the longitudinal direction of the pipe, means on the carriage for first cutting a taper thread on the initially threaded portion of the pipe to form nipple sections, the

said other means including opposite sets of roller dies, a housing, a bearing block for each set of dies slidably mounted in the housing, springs normally tending to spread the said blocks to move the sets of roller dies apart, lever devices having cam portions for engaging the blocks to move them and the sets of dies toward eachother, and. operative connections between the driven shaft and the lever devices for oscillating the said lever devices. 7

22. In a nipple making machine, the combination with a threaded pipe, and means for revolving the pipe; of mechanism for shaping the pipe into tapered nipple shaped sections, said mechanism comprising ahousing through which the threaded pipe is projected, opposite sets of roller taper thread forming dies for engaging the threaded pipe section, a bearing block for each set of dies,

JOHN A. DOVVD.

. Witnesses:

JOHN T. CAREY, JAMEs E. DUGGAN.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

